/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package servlet;

import applicationexcepcion.IdFotoNonValido;
import ejb.common.FotoManagerLocal;
import entity.Foto;
import java.io.IOException;
import java.io.OutputStream;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.ejb.EJB;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author Carmela
 */
public class ImageServlet extends HttpServlet {

    @EJB
    private FotoManagerLocal fotoManager;

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        OutputStream os=response.getOutputStream();
        try {
            Long idFoto = Long.parseLong(request.getParameter("idFoto"));
            try {
                Foto f = fotoManager.cercaFotoDaId(idFoto);
                String nome=f.getNome();
                String ext="jpg";
                int i=nome.indexOf(".");
                if(i!=-1){
                    ext=nome.substring(i+1);
                }
                response.setContentType("image/"+ext);
                os.write(f.getFoto());
            } catch (IdFotoNonValido ex) {
                Logger.getLogger(ImageServlet.class.getName()).log(Level.SEVERE, null, ex);
            }
        } finally {
            os.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
